CN105182526A - Polyimide flexible transparent substrate and preparation method thereof, and electrofluidic display device - Google Patents
Polyimide flexible transparent substrate and preparation method thereof, and electrofluidic display device Download PDFInfo
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- CN105182526A CN105182526A CN201510559604.4A CN201510559604A CN105182526A CN 105182526 A CN105182526 A CN 105182526A CN 201510559604 A CN201510559604 A CN 201510559604A CN 105182526 A CN105182526 A CN 105182526A
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- polyimide
- preparation
- display part
- electric moistening
- base plate
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- 229920001721 polyimide Polymers 0.000 title claims abstract description 85
- 239000004642 Polyimide Substances 0.000 title claims abstract description 49
- 239000000758 substrate Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- 230000009975 flexible effect Effects 0.000 title claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims description 21
- 239000002904 solvent Substances 0.000 claims description 14
- 238000004528 spin coating Methods 0.000 claims description 13
- 238000010792 warming Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 10
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000010408 film Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 239000011521 glass Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 150000002466 imines Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 238000001259 photo etching Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention discloses a polyimide flexible transparent substrate and a preparation method thereof, and an electrofluidic display device. The preparation method provided by the invention is simple in process and convenient to control and facilitates large-scale production. A conventional preparation device of a hard substrate can also be employed, and at the same time, the obtained polyimide flexible transparent substrate can also, based on a conventional preparation process of a flat electrofluidic display device, realize manufacture of a flexible electrofluidic display device, such that the cost for replacing equipment is saved for an enterprise, industrial upgrading is facilitated, and development of a flexible display device can be accelerated.
Description
Technical field
The present invention relates to flexible electrical and soak display technique field, be specifically related to a kind of polyimide flex transparency carrier and preparation method thereof, and comprise the electric moistening display part of this substrate.
Background technology
Along with the develop rapidly of electronic technology, the digital product of feature richness fly into already ordinary other, frivolous, portable wearable electronic equipment becomes the new focus attracted the attention of millions of people.Produce style different, the electronic equipment of comfortable wearing, a display device that can bend and even can fold is indispensable.The display device that we use at present is all generally inflexibility or folding, and has inadequate natural endowment in weight, portability, impact resistance etc., cannot meet the demand of the more renewals of people.And there is the favor that the plurality of advantages flexible display devices such as ultralight, ultra-thin, rollable, portable, shock resistance start to be subject to people, one of important development direction becoming following display technique.Countries in the world manufacturer enthusiasm in the preparation of curve flexibility display part is surging, and has obtained certain achievement, and as Samsung, the LG of Korea S, the Sony etc. of Japan has all been proposed the product such as mobile phone, TV with curved-surface display.But they are still substrate with hard material, not yet realize the flexible effect that can bend arbitrarily, and employing is self luminous OLED, power dissipation ratio is higher, and on the wearing electronic equipment that electricity is limited, application can't reach desirable effect.Realize the display of low-power consumption, reflective display technique is one of optimal selection, and the wetting display technique of electricity is a member important in reflective display, is the reflective display technique of one that can realize video and colored display.
The wetting display of electricity refers to by changing the voltage be applied between liquid-solid electrode, change the interfacial tension between liquid and solid, thus change liquid realizes the driving of liquid and the change of space distribution at the contact angle of solid surface, finally reach the function of transmitted light or reflected light being carried out to photoswitch, complete display.Its ultimate principle is: the contact angle being changed liquid in display unit by impressed voltage, and then the distribution changing liquid, finally reaches the function of transmitted light or reflected light being carried out to switch.Three this type of switches are applied in the three primary colours (RGB) of color respectively, by reaching colored display object to the switch of these three kinds of colors and color assignment.This display can utilize extraneous light source, and can only need luminous place to carry out energy drives, and therefore it has the series of advantages such as energy consumption is low, rich color, volume are little, the response time is short.Be a kind of reflective display because electricity soaks display, in energy consumption, health and chromaticity, have outstanding performance, be therefore broadly considered one of following main flow display technique.
Shown in the single dot structure (as Fig. 1) of electric moistening display part, be made up of parts such as infrabasal plate 2, electrode layer 3, drain insulating layer 5, pixel wall 4, ink 6, water 7, upper substrates 1.In display device structured material except upper and lower substrate, current other materials is fluent material or macromolecular material, all has flexible nature.Existing electric moistening display part upper and lower base plate is generally the hard substrates such as glass, can only make flat-panel display device, can not make flexible flexible display device, hinder the development of flexible electrical moisten display part.
Summary of the invention
For solving the problem, the invention provides a kind of polyimide flex transparency carrier and preparation method thereof; And there is the electric moistening display part of polyimide flex transparency carrier.
The solution that the present invention solves its technical matters is:
A preparation method for polyimide flex transparency carrier, comprises the following steps:
1) on hard floor, cofferdam is made; Preferably, the height in cofferdam is at 10-5000 μm.
2) in the cofferdam prepared, polyimide solution is added, and spin-coating film, then at 30-50 DEG C of boiler portion solvent;
Preferably, the viscosity of polyimide solution is 1000-10000cSt, and volume is 1-10ml;
Preferably, spin coating adopts low speed coating, and rotating speed is 100-1000r/min, and spin-coating time is 10-30s;
Preferably, the time of 30-50 DEG C of boiler portion solvent is 5-30min.
3) step 2 is repeated) several times, obtain the polyimide film of desired thickness; The thickness of polyimide film sets, preferably between 100-1000 μm according to the thickness of application; Multiplicity also adjusts along with the change of thickness, and preferably, if described polyimide flex transparency carrier is the upper substrate of electric moistening display part, multiplicity is 2-5 time; If described polyimide flex transparency carrier is the infrabasal plate of electric moistening display part, multiplicity is 5-10 time.
4) base plate with polyimide film step 3) obtained heats at low temperatures, and the solvent in polyimide film is volatilized; For the ease of film forming, typical temperature is no more than 100 DEG C, preferably, is placed in 70 DEG C, heating 10-40min.
5) stop heating after being warming up to 200-300 DEG C immediately, naturally cool to room temperature, polyimide film is peeled off from base plate, obtain described flexible transparent polyimide substrate.
Another aspect of the present invention, also provides the polyimide flex transparency carrier prepared by such scheme.
In addition, present invention provides a kind of electric moistening display part, comprise polyimide flex transparency carrier of the present invention.
The invention has the beneficial effects as follows: the preparation method of polyimide flex transparency carrier of the present invention, technique is simple, is convenient to control, is beneficial to large-scale production.And the Preparation equipment of existing hard substrate can be utilized, the polyimide flex transparency carrier simultaneously obtained also can based on the preparation technology of existing dull and stereotyped electric moistening display part, realize the making of flexible electrical moisten display part, for enterprise has saved the cost with exchange device, be convenient to industrial upgrading, the development of flexible display device can be accelerated.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described.Obviously, described accompanying drawing is a part of embodiment of the present invention, instead of whole embodiment, and those skilled in the art, under the prerequisite not paying creative work, can also obtain other design proposals and accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of electric moistening display part;
Fig. 2 is polyimide flex transparency carrier schematic diagram of the present invention;
Fig. 3 is the electric moistening display part display effect schematic diagram possessing polyimide flex transparency carrier of the present invention.
Embodiment
Clear, complete description is carried out, to understand object of the present invention, characteristic sum effect fully below with reference to embodiment and the accompanying drawing technique effect to design of the present invention, concrete structure and generation.Obviously; described embodiment is a part of embodiment of the present invention, instead of whole embodiment, based on embodiments of the invention; other embodiments that those skilled in the art obtains under the prerequisite not paying creative work, all belong to the scope of protection of the invention.Each technical characteristic in the invention, can combination of interactions under the prerequisite of not conflicting conflict.
A preparation method for polyimide flex transparency carrier, comprises the following steps:
1) on hard floor, cofferdam is made; Hard floor can be the inorganic material base plates such as glass, or plastic bottom board etc., as long as do not react with polyimide, and certain temperature can be born; Preferably, described base plate is glass or the brilliant base plate of circle.
Cofferdam, mainly in order to define the shape of the limitation imines substrate obtained, can adopt the stationary frame structure etc. of solid frame (pre-processed plate frame), printing rubber frame (framed structure of liquid printing and dry aftershaping), photoetching acquisition.Preferably, the height in cofferdam is 10-5000 μm.
2) in the cofferdam prepared, polyimide solution is added, and spin-coating film, then at 30-50 DEG C of boiler portion solvent.
For the ease of film forming, preferably, the viscosity of polyimide solution is 1000-10000cSt, and volume is 1-10ml.
Preferably, easily adopt low speed coating, rotating speed is 100-1000r/min, and spin-coating time is 10-30s, to ensure homogeneity and the continuity of film forming.
After spin coating, partial solvent is removed in heating, reaches the effect of sizing, avoid the coating before subsequent coated impact, but simultaneously, reserve part solvent again, makes rete have certain viscosity, ensures to combine closely between the rete applied below; Preferably, the time of 30-50 DEG C of boiler portion solvent is 5-30min.
3) step 2 is repeated) several times, obtain the polyimide film of desired thickness.
The thickness of polyimide film sets, in conjunction with the condition of spin coating proceeding and the character of polyimide solution, preferably between 100-1000 μm according to the thickness of application.
Multiplicity also adjusts along with the change of thickness, and preferably, if described flexible transparent polyimide substrate is the upper substrate of electric moistening display part, multiplicity is 2-5 time; If described flexible transparent polyimide substrate is the infrabasal plate of electric moistening display part, multiplicity is 5-10 time.
4) base plate with polyimide film step 3) obtained heats at low temperatures, and the solvent in polyimide film is volatilized; For the ease of film forming, typical temperature is no more than 100 DEG C, preferably, is placed in 70 DEG C, heating 10-40min.
5) stop heating after being warming up to 200-300 DEG C immediately, naturally cool to room temperature, polyimide film is peeled off from base plate, obtain described polyimide flex transparency carrier.
After high temperature, cooling is better merged to allow between each layer again, and play the effect of annealing (annealing), can improve thin film stability.
Below in conjunction with preferred embodiment the present invention done and illustrate further.
embodiment 1
1., at long 7cm, wide 7cm, in the middle part of the glass plate of thick 0.7mm, is highly the square cofferdam of 300 μm with silica gel preparation.
2. in cofferdam, add viscosity is that the polyimide solution of 7000cSt is about 3ml, under the condition of rotating speed 1000r/min, and spin coating 18s film forming; Then glass plate is placed on panel heater, at 40 DEG C, heats 5min, evaporation section solvent.
3. repeat step 2 and operate 3 times, obtain the polyimide film for electric moistening display part upper substrate.
Repeat step 2 and operate 6 times, obtain the polyimide film for electric moistening display part infrabasal plate.
4. the base plate had for the polyimide film of electric moistening display part upper substrate step 3 obtained is placed in 70 DEG C, heating 10min.
The base plate had for the polyimide film of electric moistening display part upper substrate step 3 obtained is placed in 70 DEG C, heating 30min.
5. the base plate with the polyimide film for electric moistening display part upper substrate step 4 obtained, heating is stopped immediately after being warming up to 200 DEG C, naturally cool to room temperature, polyimide film is peeled off from base plate, obtain the polyimide flex transparency carrier for electric moistening display part upper substrate.
The base plate with the polyimide film for electric moistening display part infrabasal plate that step 4 is obtained, heating is stopped immediately after being warming up to 300 DEG C, naturally cool to room temperature, polyimide film is peeled off from base plate, obtain the polyimide flex transparency carrier for electric moistening display part infrabasal plate.
embodiment 2
1., at long 5cm, wide 5cm, on the glass plate of thickness 0.7mm, with the cofferdam of silica gel preparation height 1mm
2. in cofferdam, add polyimide solution, its viscosity is 7000cSt, and volume is 5ml; Then at rotating speed 600r/min, spin coating 20s film forming, finally at 40 DEG C of heating 15min evaporation section solvents.
3. repeat step 2 and operate 4 times, obtain the polyimide film for electric moistening display part upper substrate.
Repeat step 2 and operate 8 times, obtain the polyimide film for electric moistening display part infrabasal plate.
4. the base plate had for the polyimide film of electric moistening display part upper substrate step 3 obtained is placed in 70 DEG C, heating 15min.
The base plate had for the polyimide film of electric moistening display part upper substrate step 3 obtained is placed in 70 DEG C, heating 40min.
5. the base plate with the polyimide film for electric moistening display part upper substrate step 4 obtained, heating is stopped immediately after being warming up to 220 DEG C, naturally cool to room temperature, polyimide film is peeled off from base plate, obtain the polyimide flex transparency carrier for electric moistening display part upper substrate.
The base plate with the polyimide film for electric moistening display part infrabasal plate that step 4 is obtained, heating is stopped immediately after being warming up to 280 DEG C, naturally cool to room temperature, polyimide film is peeled off from base plate, obtain the polyimide flex transparency carrier for electric moistening display part infrabasal plate.
embodiment 3
1., at long 5cm, wide 5cm, on the glass plate of thickness 0.7mm, with the cofferdam of silica gel preparation height 1mm.
2. in the cofferdam prepared, add polyimide solution, its viscosity is 2000cSt, and volume is 5ml; Then at rotating speed 600r/min, spin coating 20s film forming, finally at 40 DEG C of heating 15min evaporation section solvents.
3. repeat step 2 and operate 5 times, obtain the polyimide film for electric moistening display part upper substrate.Repeat step 2 and operate 10 times, obtain the polyimide film for electric moistening display part infrabasal plate.
4. the base plate had for the polyimide film of electric moistening display part upper substrate step 3 obtained is placed in 70 DEG C, heating 10min.
The base plate had for the polyimide film of electric moistening display part upper substrate step 3 obtained is placed in 70 DEG C, heating 40min.
5. the base plate with the polyimide film for electric moistening display part upper substrate step 4 obtained, heating is stopped immediately after being warming up to 200 DEG C, naturally cool to room temperature, substrate version is dissolved by chemical method and removes, separate Kapton, obtain the polyimide flex transparency carrier for electric moistening display part upper substrate.
The base plate with the polyimide film for electric moistening display part infrabasal plate step 4 obtained, stops heating immediately, naturally cools to room temperature, obtain the polyimide flex transparency carrier for electric moistening display part infrabasal plate after being warming up to 300 DEG C.
The preparation method of flexible transparent polyimide substrate of the present invention, both can be used for preparing the upper substrate of electric moistening display part, and also can be used for preparing infrabasal plate.Fig. 2 is the schematic diagram of the polyimide flex transparency carrier that the present invention one specific embodiment obtains.
The upper substrate obtained is by magnetron sputtering depositing electrode layers (ITO target etc.) thereon; The infrabasal plate obtained also depositing electrode layers (ITO target etc.) thereon; Hydrophobic layer, pixel wall etc. are set further; Then upper and lower substrate encapsulates, extend oil ink material, specifically can the preparation technology of reference plate electric moistening display part, just can obtain flexible electric moistening display part.Fig. 3 is an electric moistening display part display effect schematic diagram possessing polyimide flex transparency carrier of the present invention.
Electricity of the present invention soaks (EFD, ElectrofluidicDisplay) technology, has another name called electric moistening technology, and therefore the polyimide flex transparency carrier of flexible electrical moisten display part of the present invention can be used to flexible electrical wet-type display part equally.
Above better embodiment of the present invention is illustrated, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent modifications or replacement under the prerequisite without prejudice to spirit of the present invention, and these equivalent modification or replacement are all included in the application's claim limited range.
Claims (10)
1. a preparation method for polyimide flex transparency carrier, is characterized in that, comprises the following steps:
1) on hard floor, cofferdam is made;
2) in the cofferdam prepared, polyimide solution is added, and spin-coating film, then at 30-50 DEG C of boiler portion solvent;
3) step 2 is repeated) several times, obtain the polyimide film of desired thickness;
4) base plate with polyimide film step 3) obtained heats at low temperatures, and the solvent in polyimide film is volatilized;
5) stop heating after being warming up to 200-300 DEG C immediately, naturally cool to room temperature, polyimide film is peeled off from base plate, obtain described flexible transparent polyimide substrate.
2. preparation method according to claim 1, is characterized in that: described step 2) in, the viscosity of polyimide solution is 1000-10000cSt, and volume is 1-10mL.
3. preparation method according to claim 1, is characterized in that: described step 2) in, the rotating speed of described spin coating is 100-1000r/min, and spin-coating time is 10-30s.
4. preparation method according to claim 1, is characterized in that: described step 2) in, the time of described 30-50 DEG C of boiler portion solvent is 10-60min.
5. preparation method according to claim 1, is characterized in that: the polyimide thickness obtained in described step 3) is 100-1000 μm.
6. preparation method according to claim 1, is characterized in that: described polyimide flex transparency carrier is the upper substrate of electric moistening display part, described step 2) in multiplicity be 2-5 time.
7. preparation method according to claim 1, is characterized in that: described polyimide flex transparency carrier is the infrabasal plate of electric moistening display part, described step 2) in multiplicity be 5-10 time.
8. preparation method according to claim 1, is characterized in that: in described step 4), base plate is placed in 70 DEG C, heating 10-40min.
9. the flexible transparent polyimide substrate that obtains of the preparation method as described in any one of claim 1-8.
10. an electric moistening display part, is characterized in that: comprise flexible transparent polyimide substrate as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510559604.4A CN105182526B (en) | 2015-09-02 | 2015-09-02 | The preparation method of polyimide flex transparency carrier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510559604.4A CN105182526B (en) | 2015-09-02 | 2015-09-02 | The preparation method of polyimide flex transparency carrier |
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| Publication Number | Publication Date |
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| CN105182526A true CN105182526A (en) | 2015-12-23 |
| CN105182526B CN105182526B (en) | 2018-03-09 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386329A (en) * | 2011-11-14 | 2012-03-21 | 中山大学 | Manufacturing method of flexible electronic device |
| CN102627780A (en) * | 2012-03-30 | 2012-08-08 | 北京化工大学 | Method for preparing submicron polyimide self-supporting film by adopting spin-coating method |
| CN102675665A (en) * | 2012-04-23 | 2012-09-19 | 常州市阳光药业有限公司 | Colorless transparent polyimide film preparation method |
| CN103044916A (en) * | 2012-12-24 | 2013-04-17 | 南京依麦德光电材料科技有限公司 | Flexible transparent polyimide thin film and preparation method thereof |
| US20140312328A1 (en) * | 2013-04-23 | 2014-10-23 | Samsung Display Co., Ltd. | Method of manufacturing transparent flexible display device and transparent flexible display device manufactured using the method |
-
2015
- 2015-09-02 CN CN201510559604.4A patent/CN105182526B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386329A (en) * | 2011-11-14 | 2012-03-21 | 中山大学 | Manufacturing method of flexible electronic device |
| CN102627780A (en) * | 2012-03-30 | 2012-08-08 | 北京化工大学 | Method for preparing submicron polyimide self-supporting film by adopting spin-coating method |
| CN102675665A (en) * | 2012-04-23 | 2012-09-19 | 常州市阳光药业有限公司 | Colorless transparent polyimide film preparation method |
| CN103044916A (en) * | 2012-12-24 | 2013-04-17 | 南京依麦德光电材料科技有限公司 | Flexible transparent polyimide thin film and preparation method thereof |
| US20140312328A1 (en) * | 2013-04-23 | 2014-10-23 | Samsung Display Co., Ltd. | Method of manufacturing transparent flexible display device and transparent flexible display device manufactured using the method |
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Effective date of registration: 20240619 Address after: 518000 b715, Yinxing technology building, 1301 Guanlan community sightseeing Road, Guanlan street, Longhua District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN GUOHUA OPTOELECTRONICS Co.,Ltd. Country or region after: China Address before: South China advanced Optoelectronics Research Institute, South China Normal University, No. 378, Waihuan West Road, Panyu District, Guangzhou City, Guangdong Province, 510006 Patentee before: SOUTH CHINA NORMAL University Country or region before: China Patentee before: SHENZHEN GUOHUA OPTOELECTRONICS Co.,Ltd. Patentee before: ACADEMY OF SHENZHEN GUOHUA OPTOELECTRONICS |